一种低能耗多跳无线传感器网络时间同步算法  

A TIME SYNCHRONIZATION ALGORITHM FOR LOW ENERGY MULTI-HOP WIRELESS SENSOR NETWORKS

作　　者：张超 黄友锐[2] 陈珍萍 Zhang Chao;Huang Yourui;Chen Zhenping(School of Computer Science and Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China;School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China;School of Electrical and Information Engineering,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China)

机构地区：[1]安徽理工大学计算机科学与工程学院,安徽淮南232001 [2]安徽理工大学电气与信息工程学院,安徽淮南232001 [3]苏州科技大学电气与信息工程学院,江苏苏州215009

出　　处：《计算机应用与软件》2020年第5期102-107,共6页Computer Applications and Software

基　　金：国家自然科学基金项目(61772033,51874205);安徽省科技重大专项(16030901012)。

摘　　要：针对多跳网络时间同步存在同步开销高、累积误差大等问题,提出一种低能耗多跳时间同步算法。在主网络中运用基于频偏估计的双向时间同步方法,在次网络中使用SRS和ROS相结合的方法进行同步。在保证一定同步精度情况下摒弃了SRS方法同步周期长、同步开销大的缺点,也缓解了ROS方法累积误差大的问题。仿真结果表明,该算法在拥有较低同步功耗前提下也具有较高的同步精度,能适用于大部分场景中,因此具有重要的理论研究意义和实际应用推广价值。Aiming at the problems of high synchronization cost and large cumulative error for multi-hop network time synchronization,this paper proposes a low-energy multi-hop time synchronization algorithm.It used a two-way time synchronization method based on frequency offset estimation in the primary network,and used the combination of SRS and ROS in the secondary network for synchronization.The algorithm eliminated the shortcomings of long synchronization period and large synchronization overhead of SRS method while guaranteeing a certain synchronization precision,and also alleviated the problem of large cumulative error of ROS method.The simulation results show that the algorithm has high synchronization accuracy under the premise of low synchronous power consumption,and it can be applied to most scenarios.Therefore,it has important theoretical research significance and practical application promotion value.

关 键 词：无线传感器网络 时间同步 低能耗 多跳 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]